How to trigger createRecordComponent() on TreeGrid's leafs?

[hlevin]

I am using one of the older nightly builds but I doubt this is a bug, it seems I may be doing something wrong.

I updated SmartGWT to the last night's build and the same problem exists.
We are on SmartGWT Pro 3.1d 10/03/12.
Isomorphic, I am totally stuck and could really use some advice, it is rather urgent that I figure this out.

I have a TreeGrid, I set setShowRecordComponents(true) and setShowRecordComponentsByCell(true). The data in that TreeGrid is a copy being created by Drag and Drop from another TreeGrid. Essentially, only a parent element is being dragged - that works just fine and recordcomponents are all created succesfully. As soon as parent record is dropped, I call RPC services from addFolderDropHandler. RPC queries the data which is then brought into the TreeGrid using treeGrid.getTree().linkNodes(treeNodes);

The tree is rendered as it's supposed to with proper parent/child linking. What is not happening is that children that are retrieved using RPC do not invoke createRecordComponent(). I tried invalidateRecordComponents() to no avail. Something makes these new leafs different from the parent records.

TreeGrid surrenderTreeGrid = new TreeGrid() {
  @Override
  protected Canvas createRecordComponent(final ListGridRecord listGridRecord, Integer colNum) {
      String fieldName = this.getFieldName(colNum);

       if(fieldName.equalsIgnoreCase("myField")){
            return new Canvas();
       }

       return null;
  }
}

surrenderTreeGrid.setCanAcceptDroppedRecords(true);
surrenderTreeGrid.setShowRecordComponents(true);
surrenderTreeGrid.setShowRecordComponentsByCell(true);


surrenderTreeGrid.addFolderDropHandler(new FolderDropHandler() {
    @Override
     public void onFolderDrop(FolderDropEvent folderDropEvent) {
         // calling RPC here, actual call removed
         // onSuccess() body 
         {
                  TreeNode[] treeNodes = new TreeNode[rpcMessage.recs.size()];
                  int i = 0;
                  for( looping over return results ) {
                           TreeNode treeNode = new TreeNode();
                           treeNode.setAttribute()....;
                           treeNodes[i] = treeNode;
                            i++;
                    }
                    surrenderTreeGrid.getTree().linkNodes(treeNodes);
          }
     }
});

Thanks,
Henry

[hlevin]

Same issue on 3.1d-2012-10-03. is this an expected behavior or a bug?

[hlevin]

Found the problem, it was in my own code as I expected. I had stub code that was aborting createRecordComponet() and returning null. It was a needle in a haystack.